<!DOCTYPE html>

<html>
<head>
  <style type="text/css">
    body { overflow: hidden; }
    .box {
      display: inline-block;
      box-sizing: border-box;
      -moz-box-sizing: border-box;
      width: 150px;
      height: 150px;
      margin: 20px;
      border-width: 50px;
      border-color: rgba(0, 0, 0, 0.5);
      border-style: solid;
      border-radius:20%;
    }
  </style>
</head>
<body>
  <!-- Test mixed border styles. -->
  <div class="box"></div>

  <div class="box" style="border-right-style: double"></div>
  <div class="box" style="border-right-style: double; border-right-width: 0;"></div>
  <div class="box" style="border-right-color: transparent;"></div>

  <div class="box" style="border-right-color: transparent; border-right-width: 50px;"></div>
  <div class="box" style="border-right-color: transparent; border-right-width: 0;
                          border-bottom-color: transparent;"></div>
  <div class="box" style="border-right-color: transparent; border-right-width: 0;
                          border-bottom-color: transparent;border-bottom-width: 0"></div>
  <div class="box" style="border-right-color: transparent; border-right-width: 0;
                          border-bottom-style: groove;"></div>
</body>
</html>
